DL manuals
Yaesu
Transceiver
FT-1900R
Technical Supplement

Yaesu FT-1900R Technical Supplement

Other manuals for FT-1900R: Operating Manual

Page of 34

Download

Print this page

Bookmark us

Introduction

This manual provides technical information necessary for servicing the FT-1900R FM Transceiver.

Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-

qualified persons to service this equipment may result in permanent damage not covered by the warranty,

and may be illegal in some countries.

Two PCB layout diagrams are provided for each double-sided circuit board in the Transceiver. Each side of

is referred to by the type of the majority of components installed on that side (“leaded” or “chip-only”). In

most cases one side has only chip components, and the other has either a mixture of both chip and leaded

components (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only.

While we believe the technical information in this manual to be correct, VERTEX STANDARD assumes no

liability for damage that may occur as a result of typographical or other errors that may be present. Your

cooperation in pointing out any inconsistencies in the technical information would be appreciated.

EH023N91A

Technical Supplement

Specifications ...................................................... 2

Exploded View & Miscellaneous Parts ............ 3

Block Diagram .................................................... 5

Connection Diagram .......................................... 6

Circuit Description............................................. 7

Alignment ............................................................ 9

Contents

Board Unit

(Schematics, Layouts & Parts)

MAIN Unit Circuit Diagram ................................. 13

MAIN Unit Parts Layout ...................................... 15

MAIN Unit Parts List ............................................ 17

CNTL Unit Circuit Diagram .................................. 27

CNTL Parts Layout ............................................... 28

CNTL Parts List .................................................... 29

FM TRANSCEIVER

FT-1900R

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD

US Headquarters

10900 Walker Street, Cypress, CA 90630, U.S.A.

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close

Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,

Kwun Tong, Kowloon, Hong Kong

VERTEX STANDARD (AUSTRALIA) PTY., LTD.

Normanby Business Park, Unit 14/45 Normanby Road

Notting Hill 3168, Victoria, Australia

Important Note

The transceiver was assembled using Pb (lead) free solder, based on the RoHS specification.

Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this appara-

tus. The solder stated above utilizes the alloy composition required for compliance with the lead-free specification,

and any solder with the above alloy composition may be used.

1 2 3 4 5 6 7 Next › »

Summary of FT-1900R

Page 1
1 introduction this manual provides technical information necessary for servicing the ft-1900r fm transceiver. Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non- qualified persons to service this equipment may result in permanent damage not covere...
Page 2: Specifications
2 specifications general frequency range: tx 144 - 146 mhz or 144 - 148 mhz rx 144 - 146 mhz or 136 - 174 mhz channel step: 5/10/12.5/15/20/25/50/100 khz standard repeater shift: ±600 khz frequency stability: better than ±10 ppm [–4 °f to +140 °f (–20 °c to +60 °c)] modes of emission: f2d/f3e antenn...
Page 3
3 exploded view & miscellaneous parts g c d e f g d d d c c c f f f f f f f f e e e e e e e e e e m4090178 speaker non-designated parts are available only as part of a designated assembly. S8002063 cap-sp ra1105100 front panel ra1105200 rubber knob g6090169 lcd ra0754500 inter connector ra0754600 di...
Page 4: Note
4 note.
Page 5: Block Diagram
5 block diagram.
Page 6: Connection Diagram
6 connection diagram.
Page 7: Circuit Description
7 circuit description receive signal path incoming rf signal is from the antenna jack is de- livered to the main unit and passed through the low- pass filter network consisting capacitors c1213, c1236, c1239, & c1241 and coils l1017, l1018, & l1019, antenna switching diode d1020 and d1028 (both rls1...
Page 8: Circuit Description
8 circuit description tx apc circuit a portion of the power amplifier module output is rectified by d1022 (1ss321), then delivered to apc q1038 (lm2904pwr), as a dc voltage which is pro- portional to the output level of the power amplifier module. The apc q1038 (lm2904pwr) is compared the rec- tifie...
Page 9: Alignment
9 alignment introduction the ft-1900r is carefully aligned at the factory for the specified performance across the amateur band. Realignment should therefore not be necessary ex- cept in the event of a component failure. Only an authorized vertex standard representative should perform all component ...
Page 10: Test Setup
10 ft-1900r inline wattmeter sinad meter deviation meter frequency counter rf signal generator af signal generator rf signal generator 50-ohm dummy load mic ant ext sp rf sampling coupler dc input alignment preparation & precautions a 50-ohm rf load and in-line wattmeter must be connected to the ant...
Page 11: Alignment
11 s-meter level (s-1) inject a 145.100 mhz signal at a level of –5 dbµ (with 1 khz modulation @±3.5 khz deviation) from the rf signal generator. rotate the dial knob to set the alignment pa- rameter to “b0111 s1 b0111 s1 b0111 s1 b0111 s1 b0111 s1.” press the [d/mr(mw)] key to enable adjustme...
Page 12: Alignment
12 dcs tx deviation rotate the dial knob to set the alignment pa- rameter to “b0101 dc b0101 dc b0101 dc b0101 dc b0101 dc.” press the [d/mr(mw)] key to enable adjustment of the “dcs tx deviation.” press the ptt switch to activate the transmitter, adjust the dial knob so that the deviation met...
Page 13: Main Unit
13 main unit circuit diagram 4.3 v 0 v rx: 1.4 v tx: 1.7 v rx: 0 v tx: 0.8 v 4.1 v 2.0 v 1.4 v 3.3 v 3.2 v rx: 0.5 v tx: 0.6 v rx: 6.1 v tx: 4.2 v 0.7 v rx: 0 v tx: 5.0 v rx: 6.9 v tx: 0.5 v rx: 0 v tx: 2.0 v rx: 0 v tx: 6.9 v rx: 0 v tx: 1.4 v rx: 0.1 v tx: 0 v rx: 2.9 v tx: 0.4 v rx: 0.6 v tx: 0.5...
Page 14: Main Unit
14 main unit note.
Page 15: Main Unit
15 main unit parts layout (side a) b a d c e f h g i 1 2 3 4 5 6 7 2sa1774 (fr) (q1007) 2sc4081 (b) (q1033) 2sc4400 (rt4) (q1032) 2sc4617 (br) (q1051, 1053) 2sc5226 (r22) (q1026) 2sc5231 (c9) (q1009) 2sc5374 (na) (q1010, 1017, 1023) dan235e (m) (d1010) cd4094bpwr (q1048) mb15a01pfv1 (q1011) njm2591v...
Page 16: Main Unit
16 main unit parts layout (side b) b a d c e f h g i 1 2 3 4 5 6 7 2sa1774 (fr) (q1024, 2027, 1029) 2sc4081 (b) (q1001, 1012, 1021, 1046, 1047) fmmtl718ta (q1025) 2sj364 (4m) (q1034, 1036, 1041, 1042) lm2904pwr (q1006, 1038, 1044, 1050) lm2902pwr (q1005, 1049) dtc144ee (26) (q1013, 1018, 1019, 1020,...
Page 17: Parts List
17 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr pcb with components cb3119006 ce:off, dst:usa2 cb3119007 ce:off, dst:exp2 printed circuit board ah023n000 fr013240e 1- c 1001 chip ta.Cap. 10uf 10v taja106m010y k78100072 1- b g5 c 1002 chip ta.Cap. 1...
Page 18: Parts List
18 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1078 chip cap. 0.015uf 50v b grm188b11h153ka01d k22174838 1- b e6 c 1079 chip cap. 150pf 50v ch grm1882c1h151ja01d k22174239 1- b e6 c 1080 chip cap. 560pf 50v ch grm1882c1h561ja01d k22174273 1- b e...
Page 19: Parts List
19 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1156 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a f6 c 1157 chip cap. 0.01uf 50v b grm188b11h103ka01d k22174823 1- a e3 c 1158 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a ...
Page 20: Parts List
20 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr c 1244 chip cap. 0.001uf 50v b grm188b11h102ka01d k22174821 1- a g4 c 1245 chip cap. 10pf 50v ch grm1882c1h100ja01d k22174211 1- a g5 c 1248 chip cap. 39pf 50v ch grm1882c1h390ja01d k22174225 1- a h5 ...
Page 21: Parts List
21 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr fb1007 ferrite beads bk1608hs121-t l9190081 1- b h1 j 1001 connector sc25-02ws p0090621 1- a a3 j 1002 connector hsj0836-0105009 p1091085 1- a a1 j 1003 connector 32flt-sm2-tb(lf)(sn)(m) p1091258 1- a...
Page 22: Parts List
22 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr q 1051 transistor 2sc4617 tl r g3346178r 1- a g5 q 1052 transistor dtc143ee tl g3070114 1- a f6 q 1053 transistor 2sc4617 tl r g3346178r 1- a f6 r 1001 chip res. 3.3k 1/16w 5% rmc1/16s 332jth j2418903...
Page 23: Parts List
23 parts list main unit description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr ref r 1076 chip res. 390k 1/16w 5% rmc1/16s 394jth j24189056 1- a g5 r 1077 chip res. 22k 1/16w 5% rmc1/16s 223jth j24189041 1- a g5 r 1079 chip res. 2.2k 1/16w 5% rmc1/16s 222jth j24189029 1- a g5 r 1081...
Page 24: Parts List
24 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1156 chip res. 39k 1/16w 5% rmc1/16s 393jth j24189044 1- a f5 r 1157 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- b d5 r 1158 chip res. 330k 1/16w 5% rmc1/16s 334jth j24189055 1- b c5 r 1159...
Page 25: Parts List
25 parts list main unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr r 1236 chip res. 2.2k 1/16w 5% rmc1/16s 222jth j24189029 1- a g5 r 1237 chip res. 680 1/16w 5% rmc1/16s 681jth j24189023 1- a g6 r 1238 chip res. 4.7k 1/16w 5% rmc1/16s 472jth j24189033 1- b b7 r 1239...
Page 26: Main Unit
26 main unit note.
Page 27: Cntl Unit
27 cntl unit circuit diagram 5.0 v rx: 4.8 v tx: 0.6 v 4.8 v rx: 4.8 v tx: 0.6 v 5.0 v 0 v 0 v 0 v 2.6 v 2.6 v 2.3 v 0 v 5.0 v 5.0 v 0 v 0 v 5.0 v 1.8 v 5.0 v 4.9 v 0 v 5.6 v 0.6 v 1.2 v 5.0 v 2.5 v 3.9 v 5.0 v 3.6 v 5.0 v 3.6 v 4.0 v 8.0 v 3.4 v 0 v 0 v 0 v 4.6 v 5.0 v rx: 13.1 v tx: 11.9 v rx: 13....
Page 28: Cntl Unit
28 cntl unit parts layout (side a) b a d c e f h g i 1 2 3 2sc4617 (br) (q2007, 2008, 2013) 2sc5374 (na) (q2003) br24l64 (q2006) hd64f2266tf13 (q2002) b a d c e f h g i 1 2 3 s-812c50aua (q2010) dtc143ze (e23) (q2012) bd4830fve (q2011) dtc143ze (e23) (q2004) cph6202 (cb) (q2005) dan222 (n) (d2023) d...
Page 29: Parts List
29 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr pcb with components cs2033409 ce:off, dst:usa2, typ:a2 cs2033410 ce:off, dst:exp2, typ:a1 cs2033411 ce:off, dst:exp2, typ:a2 cs2033412 ce:off, dst:exp2, typ:a3 cs2033415 ce:off, dst:exp2, typ:b3 print...
Page 30: Parts List
30 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot side lay adr Ú : please contact vertex standard d 2009 led sml-512wwt86 g2071104 1- a d2 d 2010 led sml-512wwt86 g2071104 1- a e2 d 2011 diode 1ss400 te61 g2070634 1- b d1 d 2012 diode 1ss400 te61 g2070634 1- b d1...
Page 31: Parts List
31 parts list cntl unit ref description value v/w tol. Mfr's desig vxstd p/n vers. Lot … lay adr r 2039 chip res. 68k 1/16w 5% rmc1/16s 683jth j24189047 1- b a2 r 2040 chip res. 220k 1/16w 5% rmc1/16s 224jth j24189053 1- b a2 r 2041 chip res. 6.8k 1/16w 5% rmc1/16s 682jth j24189035 1- b a1 r 2042 ch...
Page 32: Note
32 note cntl unit.
Page 33
33.